Liquid discharge head

A liquid discharge head comprising:

• a flow passage substrate which is formed with a plurality of individual flow passages, the individual flow passages including a plurality of nozzles and a plurality of pressure chambers communicated with the nozzles respectively, the pressure chambers being open on a surface of the flow passage substrate;
• a sealing member which is adhered to the surface via an adhesive and configured to seal the pressure chambers;
• and
• an actuator substrate which has a piezoelectric layer and a plurality of individual electrodes, the piezoelectric layer being adhered to a surface of the sealing member on a side opposite to the flow passage substrate via an adhesive, the individual electrodes being formed on a side opposite to the sealing member with respect to the piezoelectric layer, the individual electrodes being overlapped with the pressure chambers respectively in an orthogonal direction orthogonal to the surface,
• wherein the sealing member is composed of a material different from a material of the piezoelectric layer,
• the surface has an adhesion area to which the sealing member is adhered and a non-adhesion area to which the sealing member is not adhered, and
• the surface is formed with:
• a first groove which extends in an extending direction directed from the adhesion area to the non-adhesion area and which spreads over the adhesion area and the non-adhesion area;
• and
• a second groove which extends in an intersecting direction intersecting with the extending direction in the non-adhesion area and which is connected to the first groove.